Lamp.



E. G. K. ANDERSON.

LAMP.

APPMUATION FILED AUG.29.1913.

Patented Deo. 29, 1914.

ERNST G. K. ANDERSN, F CHICAGO, ILLINOIS.

LAMP.

Specicaticn of Letters Patent.

Patented Dec. 22.', ilQild.

Application led August 29, 1913.. Serial No. 787,263.`

T0 all whom it may concern Be it known that I, ERNST G. K. ANDER- i son, a citizen of the United States', and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Lamps;

and I do hereby declare that the-following is a full, clear, and exactvdescription thereof, reference being had to the` accompanying drawings, and to the characters of reference specification.

rll`his invention relates to a novel electrical lamp for use by dentists and surgeons.

The invention refers to a removable transf arent shield for inclosing the lamp and .l)amp body, whereby'the shield may be removed and sterilized for sanitary purposes,

lamp. i I

The invention consists 1n the matters hereinafter set forth and more particularly 7 is a longitudinal axial section of a modified form of lamp fixture.y Fig. Sis a detail of the switch embodied inthe fixture shown in Fig. 7. Fig. 9 is a plan view of the switch terminal shown in Figs. 7 and 8. Fig. 10 is 'tra a plan view of the switch bary shown in sshown in the drawingsl designates an elongated fiber or other insulating tube which extends from front to rear of the lamp fixture and itsat the base' of the fixture within a short insulating, hollow base member 16 which' isprovided at its outer end 'with an opening 17 to receive the insulating conductors 18 of the lamp circuit. The'said socket memberfis inclosed by a ferrule' 19 made of metal or like material.

2O designates a lamp which is slidingly fitted into the forward end of the tube 15.

21 designates an insulating partition mein ber, separately shown in Fig. 5, which extends longitudinally through the tube 15 and lits at its edges closely against thelinner ig. 6 is a perspective view wall of the tube so as to hold the partition member in place. Between the partition member and the tube 15 are provided passages through which extend the conductors 18. The said partition member is widened at 22 to it closely within the insulating base member -16, and the said base member is provided with a shoulder 24 against which the widened end of the partition member 22 fits,

as shown in Figs. 4.- and 7. The tube'l marked thereon, which `form a part of this member is made narrowest at its front end 26 and is provided at the base of said narrowest portion with notches 27, for a pury pose hereinafter to be described. and also to the general construction of the-V The conductors 18 are attached at the lamp end of the fixture t0 lamp terminals designated, as a whole, by 30, separately shown in -portions of the said terminals are slightly curved to constitute a socket to receive the base 37 of the lamp 20. The said narrower portions 31 of the terminals are each provided with hook shaped lugs 34, 34 which receivethe terminals of the conductors 18, the said conductors being inserted into the hook lugs and soldered or otherwise permanently attached thereto. The narrowest portions 31 of the said terminals are provided with inturned lugs 36 which fit into the notches 27 of the insulating partition 21 so as'ito hold the terminals from endwise displacement on the partition.

In assembling the device, after .the.conductors have been fixed 'to the terminals 30, the terminals are fitted to the insulating partition with the lugs 36 engaging the notches 27 thereof and with the hook-lugs 34 oversition with respect to the insulating partition or terminal support. The widened por* tions of the terminals terminate at about the end of the tube 15 and constitute a slit sleeve or socket to receive the base of the lamp;

the lamp base being provided with the usual lamp terminals 37 for'contact-with the circuit terminals 32. l

The construction described provides a.

compact and readily assembled structure which is made of a length to enable the lamp I to be` readily inserted into the mouth or other part to be illuminated, and may be made of such small diametera's'to beconveniently and readily manipulated-by the operator.

As a further improvement I provide means for maintaining the fixture at all -times in a sanitary condition.k To this end,

I provide a shield 40 which is removably fitted over the lamp and tube. -Said shield is made of transparent material such as glass and preferably extends throughout the length of the shank or body of the fixture. It is closed at its outer endV and open at its inner end so as to be applied over the ixture. In some uses of the fixture the length of the i' shank may be shortened, it being, however,

of the fixture.. As herein shown, the sleeve isslitted at 42 so as to provide spring arms 43which readily fit overthe ferrule and also permits the sleeve tol be readily slippedo of ysaid ferrule. The said inclosing shield is made of an internal diameter slightly greater than the external diameter of the tube 15 and the lamp Q0 and extends at its closed end slightly beyond the lamp, so that there is provided a dead air space between the shield and the lamp which prevents the shield from becoming unduly heated when the lamp is illuminated for a-considerable period of time. y A chief advantage of the removable shield is that the-same may be removed from the fixture after the use of the lamp and sterilized so as to thereby keep the same in sanitary condition. Thus when the lamp is required for continuous use, with different patients, al number of such shields Y may be provided for use with a single lamp and fixture, so as to insure a sanitary shield to be always at hand for use when required.

The construction of the fixture before described lends itself readily to the use of the transparent shield and enables the shield to be quicklyl applied without changing the construction of the fixture.

In the construction shown in Figs. 1,-2, 3 and 4, the fixture is adapted for use in a circuit having a controlling or cut-ofi switch (not shown) exterior to the fixture. In

45 which is carried by thev switch. The said terminal is made of a sheet metal blank 46, shown in Fig. 9, which is provided atI one end with arms 47 thatare folded upwardly to constitute the loop 45, and at the other end with arms 48 which lie flat on the wider end of said partition and are folded downwardly through notches 49.

so as to thereby hold the terminal in place on the insulating partition. 50 designates a spring switch member which is adapted for contact at its front, narrower end with thel hook'lug of one of the lamp socket terminals 30, as shown in Fig. 7 The other or rear end of the switch member extends rearwardly beyond the terminal 46 and is widenedy at 52 to engage saidtermin'al 46. The free end of the resilient socket member 50 is normally held away from the terminalv 46 by its resiliency, and is adapted to be pressed toward the said latter terminal by a push'button 53, so as to thereby close the circuit through the lamp. In other respects,

the lamp fixture shown in Fig. 7may be made like that before described, and in simi- Y lar parts bear like reference characters.

As a further improvement I may provide the'shield 40 at the closed end thereof and adj acent to the lamp with a mirror 55 in 'povsition to reliect the light of the lamp, said -mirror being arranged at an angle in front of theclcsed end of the shield and with the axis of the lamp. in line with the base portionA ofthe mirror. As hereinshown the mirror is detachably littd to the shield by means of a clasp 56 which embraces the. i

shield, and to which the shank 57Y of the mirror is fixed. v Y

The' structural details of,` the Vlamp'l described may be varied within the spirit and scope of the invention, andthe inventionis 'not limited to said details except as such delll and open at its rear end and itted over said lamp body7 throughout substantially the en tire length of the latter, a collar fitted tothe open rear end of the shield and spring arms 'cariied by said collar and frictionally en gaging the rear end of the fixture bodv only whereby said shield is readilyI attachable to and detachable from said body, for the purpose set forth.

' nals.

2. A lamp fixture for` the purpose set l i forth, comprising an insulating tube, an insulating partition extending longltudinallyl therethrough, socket terminals fitted to the forward end of said partition and extending therebeyond to constitute .a lamp socket, there being provided between the sides of the partition and the inner Wall of the tube passageways for conductors of the lamp circuit, and conductors extending through said passageways and connected to said termi- 3. A vlamp fixture for the purpose set forth, comprising an insulating tube, an insulating partition extending longitudinally therethrough, socket terminals tted to the forward end of the said partition and extending therebeyond to constitute a lamp socket, there being provided between the sides of thcpartition and the inner wall of p the' tube passageways for conductors for the lamp circuit, conductors extending through said nassageways between said partition and i vk@the inner wall of the tube and connected to f-the said terminals, an insulating base socket, y,tted over the rear end of the tube having a shoulder to engage one end of the partition,

said partition being provided with shoulders to contact with the end ofthe said tube.v and said insulating socket member being provided with an opening' through which the conductors extend.

et. A lamp fixture forlth'el purpose set forth, comprising, in combination with a tube, an insulating partition extending 1onv gitudinally therethrough 'to divide the tube into separate conductor passages, with con--V ductors extending therethrough, andA lampv socket terminals fitted to the outer Zedges' of 40 the said partition and provided' with lugs adaptedto engage notches insaid partition. "^"x5. A lamp fixture for the purpose set forth, comprising, Yin combination with a tube, an insulating partition extending longitudinally therethrough to divide the tube into separate passages for the conductors of a lamp circuit, with conductors extending therethrough, and lamp socket terminals fitted to the opposite edges of said partition, and provided with lugs adapted to engage notches in said partition, said terminals being provided with lugs to which the end of the lamp circuit conductors are connected.

6. A lamp fixture for the purpose set forth. comprising, in combination with` a tube, an insulatin partition extending longitudinally=theret rough to divide the tube into separate passages for the conductors of a lamp circuit, with conductors extending therethrough, and lamp socket terminals itted to the opposite edges of said partition l. and pro-vided with lugs adapted to engage notches in said partition, said terminals being provided with lu s to which the end of. the lamp circuit con uctors are connected, one side of said lamp) circuit being divided, and a switch carried y the lixture tobridge lsaid divided side of the circuit.

7. A lamp for dental and surgical uses comprising, a tube, an'insulating partition therein, lamp''socket terminals carried by said partition to constitute a lamp socket, a conductor extending longitudinally through one of the passages between the partition l I and the tube wall and connected to one of the lamp socket terminals, a switch terminal carried by the end of said partition to 1 which the other lamp conductor is connectv ed, and a'movable switch member connected to one' of the lamp socket terminals and ex tending in overlapping relation to and having means to press it against the first mentioned switch terminal, for the purpose set forth.

' In testimony that I claim the foregoing as my invention I affix my signature in the presence vof two Witnesses, this 27th day of August, A.. D. 1913.

- ERNST G. K. ANDERSON.

Witnesses:

W. L. HALL, `A. Po'rAsoH. 

